Button machine saw filing device



April 6, 1937. W c. PROTSMAN f 2,076,129

BUTTON MACHINE SAW FILING DEVICE ff if f5 Inventor W2- ZZarf 1702@ swza?.

l By ./1 l'lorne y April 6, 1937. W C. PROTSMAN 2,076,129

BUTTON MACHINE SAW FILING DEVICE Filed May 23, 1954 '5 Sheets-Sheet 2 d j? 'Z if j d dn y E,

Inventor 'April 6, 1937.l yV` C. PROTSMAN 2,076,129

BUTTON MACHINE SAW FILING` DEVICE Filed May 23, '1934 3 Sheets-Sheet 3 I the teeth of Vthe button Patented Apr. 6, 1937 UNITED STATES PATENT OFFICE 4 Claims.

My invention relates generally to button sawing machines, and particularly to an attachment for mounting thereon enabling quick and accurate sharpening of the teeth of the button 6 saw without removing the button saw from the machine.

It is an important object of my invention to provide a button saw filing attachment which is capable of being positioned entirely out of the way of the operator of the machine while the attachment is not in use; and capable oi being instantly brought into operative position for ling the button saw of the machine, without removing the. button saw from its position in the 1I machine.

Other objects and advantages of my invention will be apparent from a reading of the following description in vconnection with the drawings, wherein for purposes of 'illustration I have shown a preferred embodiment of my invention.

In the drawings:-

Figure 1 is a side elevational View of a portion of a button sawing machine showing the attachment of the invention applied thereto and in its operative position. e

Figure 2 is a top plan view of Figure 1.

I Figure 3 is an elevational view taken from the right of Figure 1 and looking toward the left and showing the file in position in the attachment and the relation of the le to the button saw of the machine.

Figure 4 is a transverse vertical sectional view taken substantially on a line 4-4 of Figure 1 through a portion of the button making machine showing the stationary mounting thereon of a portion of the device of the invention.

Figure 5 is a horizontal sectional view taken substantially on a line 5 5 of Figure 3 and showing the means for indicating when the teeth of the button saw have been led to the proper depth, thereby enabling uniformly iling each of saw.

'Figure 6 is a perspective view of the swingable retaining dog.

Figure '7 is a perspective view of a portion of the stationary frame of the device. l

Figure 8 is an enlarged longitudinalY vertical sectional view taken substantially on a line 8 8' of Figure 1 showing the manner of engagement of the swingable dog of Figure 6 with the teeth of the plates which are connected to the pulley of the button making machine.

Figure 9 -is a transverse vertical sectional View taken substantially on a line 9-9 of Figure '8 showing the said plates in elevation and the manner in which vthey are mounted in the pulley.

Figure is an elevational View similar to Figure 9 with the said plates removed.

Figure 11 is a perspective view illustrating a button saw with the iile engaged therewith at such an Aangle that the file engages one `side of rather than diametrically opposite sides of the button saw.

Figure l2 is a fragmentary side elevational View of the button saw.

Referring in detail to the drawings, the numeral 5 refers generally to the pertinent part of the button making lmaclfiine having the rotatable horizontal shaft 6 on which is fixed the pulley generally designated 1, the sha-ft 6 being mounted on the AU-s'h'aped standard generally designated 8 which includes -on the -upper end of each leg a removable bearing Icap I8 which rests on a flange I 0. An inverted U-shaped member I I rests the lower ends of its legs on lthe bearing cap I0 so that its bight portion II forms the horizontal support for the transverse horizontal portion I2 from which depend screws I3, I4 which vtraverse the bight portion II', the bearing cap I8 and the llange I-IJ, below which they are provided with nuts I3 and I4', respectively, which are arranged to be tightened against the lower surface oi the ange III" to hold the described organization in place. 30

On one end of the member I2 is the short vertlcal varm I2 and on the opposite end the inverted J-shaped member generally designated I5. 'I'he member I5 and the member I2 have horizontally aligned holes I6 and I6', respectively, to receive the axially rotatable shaft I5'. The opposite ends of the shaft I5 extend beyond the elementsV I5 and I 2', respectively, and outwardly of the element I2 the shaft I5 traverses the arm 28, and outwardly oi the element I5 the shaft I5' traverses the companion arm k27, which arms have their right hand extremities joined by the cross bar 4-25IJ to form a swingable frame pivotally supported at one -end by the shaft I5. Set screws 25 and 26 traversing the arms 21, 28, respectively, lock theY saidv side members on thedescribed portions of the shaft I5.

The flower part of the J-shaped element I5 has vertically lspaced holes 15a and I'5b, respectively, through which are arranged 'the :clamping bolts 68 and `"III, respectively. The bolts also pass through the slot 6-I in the lug 68', and through the slot -I'I in the rest 69, respectivelyfso that the lug 6-8 and the rest 69 may be 4vertically adjusted with` respect to the J-.shaped element I5. 55

It will be obvious that by adjusting the lug 68 vertically a position thereof may be arranged wherein the swingable frame referred to will be supported at the proper level with the arm 21 resting on the top of the lug as shown in Figure l. It is also obvious that the rest 69 which is adapted to have its lower end supported on and rising from the bed 12 of the button making machine may be adjusted relative to the J-shaped element to afford proper support thereto while the swingable frame is in the operative position shown in Figure l.

A bolt 39 and a bolt 3| project laterally outwardly from the arms 28, 21, respectively, of the swingable frame and engage through longitudinally arranged slots in the extension arms-32, 33. The bolts 30, 3| may be tightened to clamp the arms 32, 33 in differently extendedpositions in longitudinal alignment with the side members 28, 21, respectively, to adjust the le carrying frame toward and away from the button saw. It is to be observed that the extension arm 32 is longer than the extension arm 33 and that these arms are joined and rigidly connected by the bar 34.

Rotatably mounted in the outward extremities of the extension arms 32, 33 and thereby having a biased horizontal position is the rotatable shaft 42 on which is fixed the file carrying frame. The shaft 42 has the depending handle 65 for swinging the file carrying frame toward and away from the button saw, and for sliding the shaft 42 transversely in opposite directions. The shaft 42 has thereon buffers 45, 46 which include the resilient blocks 41, 48, respectively, and the locking screws 49, 50, respectively, with the resilient blocks arranged to strike the extremities of the extension arms 32, 33 at opposite ends of the adjusted stroke of the shaft 42 to prevent jar and unnecessary wear and to accurately limit the length of the stroke of the file.

The file carrying frame comprises the plate 44 whose upper end is wrapped around the shaft 42 to form a journal including the set screws '62, 63 for locking the plate 44 to a selected position of the shaft 42 between the buffers; and, the plate 44 has fixed to the back thereof the vertical transversely elongated flat bar 54 on whose front side are fixed the depending blocks 56, 56 which have square cut holes receiving the file as indicated in the drawings, particularly Figure 3, the file 51 being of the three-cornered variety. Set screws 60 and 6|, respectively, traverse the lower ends of the blocks 56, 51 and engage the file 51 to lock the same in position.

Horizontally traversing the plate 44 is the stop screw 52 (see particularly Figures 3 and 5) the end of which is arranged to be engaged by the semi-flexible blade 31 on the arm 36 which is pivoted on the center pivot 35 of three pivots which traverse and depend from the cross member 34 which extends between the extension arms 32, 33. The pivot or anchor 39 has fixed thereto the leaf spring 38 which acts against one side of the arm 36 and forces it yieldably in a clockwise direction as shown in Figure 5, While the pivot 40 has a lateral part which bears against the opposite side of the arm 36 and acts as a stop which is to be engaged by the arm 36, the stop 40 being adjustable by pivoting it. It will be obvious that as the plate 44 is reciprocated transversely in operating the file that as the tooth of the button saw being filed wears down the saw carrying frame will be permitted to move toward the left and the consequence is the plate 44 will more closely approach the arm 38. With the stop screw 52 adjusted to extend properly through the plate 44 the end of the screw 52 will strike the semi-flexible tip 31 of the arm 36 when the tooth of the saw has been sufficiently led, so as to produce a clicking noise cooperated in by the arm 36, the spring 38 and the stop 40 when the arm 36 or the tip 31 thereof is struck by the tip of the screw 52, thereby indicating to the operator that the tooth has been sufficiently led. In this way the operator is informed instantly of reaching a proper depth in the filing of the saw teeth so that each of the teeth of the button saw may be led to a uniform depth.

Referring specifically to Figures 8 through 12 it will be observed that the pulley 1 has a concentrically formed hollow recess 1 in which the frame is arranged around the shaft 6. The frame 80 comprises upper and lower members 8|, 82 and side vertical members 83, 84, the vertical members being attached to the back of the members 8|, 82. Also mounted on the back of the members 8|, 82 are the L-shaped brackets 85, 86 which have in their foot portions radially outwardly arranged set screws 81, 83 which are engageable with the interior of the recess 1', while similarly mounted L-shaped brackets 89, 90 on the members 83, 84, respectively, have set screws 9|, 92 engaging the periphery of the recess 1 similarly to the set screws 81, 88, thereby mounting the frame within the recess of the pulley. Mounted on the front of the members 8|, 82 and 83, 84 are the blocks 93, 94, 95 and 96 and to the axially outward end of these blocks are mounted the toothed plates 91, 98, respectively, by means of bolts 99 and |90 which traverse the respective blocks and engage the respective elements of the frame 80, so that the plates 91, 98 are located outwardly of the recess 1' and in a position to have teeth thereof engaged by the swingable dog |1 whose arms i8, I9 have holes 20, 2| receiving the shaft l5 at a point between the end members of the plate l2 as shown in Figure 2. The element 22 directly engages the teeth |0I of the plates 91, 98, and the teeth |0| being arranged so as to be circumferentially positioned in accordance with the position of the teeth of the button saw, the dog l1 acts to hold the shaft 6 in such a position that the pulley 1 may be rotated by hand in a clockwise direction viewed in Figure 9 to bring the teeth of the button saw generally designated |02 into the proper position to be filed.

Each of the plates 91, 98, respectively, is a semi-circular plate. A single plate embodying these elements is avoided and the two plates provided so that the same may be assembled around the shaft 6 easily and quickly and without requiring displacement of the shaft or of the pulley whenever plates of different sizes are required to be used and mounted on the frame 80. It will be obvious that the dog |1 may be swung upwardly out of engagement with the teeth |0| whenever desired.

The button saw comprises the cylinder |03 which is receivable in the chuck 9 on the end of the shaft 6 as indicated by dotted lines in Figures 1 and 2. The tubular button saw proper |04 is slotted as indicated at |05 and is slidable in the cylinder |03 so that it may be adjusted outwardly as wear shortens the saw. An arrangement of a slot |05 and a suitable wedge |06 permits expanding the tubular saw |04 against the inside of the cylinder |03 after adjusting the saw and extending the same outwardly of the cylinder |03. The teeth |01 of the button saw are arranged to be filed at an angle less than a right angle with respect to the axis of the button saw, and only one notch defining the adjoining teeth is filed at a time, the position of the three-cornered Iile 5'! being clearly shown in Figures 11 and 12.

As soon as the button saw has been properly led, the swingable frame is tilted upwardly and pushed toward the left so as to be out of the way of the operator. The said frame does not swing all of the Way to the left to a horizontal position but is held at an angle above the pulley by the L-shaped stop 23 which is bolted as indicated at 24 to the J-shaped member I5 which forms a rest for the entire structure carried by the swingable frame. In this out of the way position (not shown) there is no part of the device directly overhanging the chuck 9 or the button saw and the operator of the button sawing machine has completely free access thereto. It is obvious that it is a simple matter to swing the organization described to the position shown in Figure 1 from the inoperative position as soon as it is desired to file the button saw by reciprocating the shaft 42 back and forth while the le is engaged in each notch of the saw until the click is made by the indicating arm 36 which shows, in respect of each notch, when the same has been adequately led to a uniform depth. Heretofore, it has been necessary to remove the button saw from the button making machine and to replace the same with another saw. This entailed stopping the machine for a considerable time and also entailed the use of skilled and expensive labor for conditioning the button saw for return to be replaced in the machine. All of these time consuming and expensive operations are eliminated in the use of the device of the invention, since with the device of the invention the same operator is enabled to quickly condition his saw as often as he sees t, without any considerable interruption in the operation of the button sawing machine.

Although I have shown and described herein a preferred embodiment of my invention, it is to be denitely understood that I do not desire to limit the application of the invention thereto, and any change or changes may be made in materials and in structure and arrangement of parts, Within the spirit of the invention and the scope of the subjoined claims.

What is claimed s:-

1. In a button sawing machine including an arbor having a chuck mounting a button saw, a bearing supporting said arbor at one side of said chuck; a frame swingably mounted on said bearing and arranged overlying said chuck and said button saw, and button saw ling means pivotally mounted on said frame and audible signaling means associated with the saw ling means to indicate a predetermined ling depth.

2. In a button sawing machine including an arbor having a chuck containing a button saw, a bed, a bearing for said arbor rising from said bed, a frame swingably mounted on said bearing, button saw filing means pivoted on said irame and engageable with said button saw, and a foot connected to and depending from said frame and engageable with said bed to support said frame in operative position and audible signaling means associated with the saw filing means to indicate a predetermined filing depth.

3. A button saw filing attachment for a button sawing machine, said machine including a bearing supporting an arbor containing the button saw, said attachment comprising a frame having extensible sides, a slide bar attached to said sides and arranged to be given different angulations with respect to the axis of the button saw by adjusting the said sides, button saw iiling means pivotally and slidably mounted on said slide bar, said means mounting said frame on said bearing for swinging on a horizontal axis into and tion and audible signaling means associated with the saw iling means to indicate a predetermined filing depth.

4. In a button sawing machine including an arbor having spaced thereon a pulley and a chuck containing a button saw, a bearing suppulley facing said chuck and frame, a dog mounted on said frame, said dog being selectively engageable with the teeth of said toothed Wheel to hold the arbor and thereby said button saw in selected positions of rotation while'ling diiTerent teeth of said button saw, and audible signaling means associated with the saw filing means to indicate a predetermined filing depth.

WILLARD C. PROTSMAN.

out of horizontal operative posi- 

